At 05:00 AM 15/05/2008, Francois De Ryckel wrote: >Hello everyone, > >How would you tag the "zero point" of a country? > >Shouldn't be an important tag as distances in a country are measure from >that point? > >Thanks for the advices. > > >François de Ryckel
François, I don't know if this will suit your particular requirements, but I've published a list of "country bounds" here which includes a centre lat/lon: http://wiki.openstreetmap.org/index.php/User:Ewmjc/Country_bounds This was generated from US government (public domain!) GNIS data. This is a dataset of several million location points around the world conveniently categorised by country. I simply calculated a bounding box for each country and then the centre point of that box. I then generated about 80% of the OSM place=country tags using the centre point to locate the tag. The OSM database should now have a tag for every country in the world (at least as defined by the US government). There are some inaccuracies though and I am working on a version two. In particular, I included marine features which makes several boxes too large, and may throw the centre point to a strange location. Once I have this sorted, I intend to add a lat_max ... lon_min or some such tags to the country tags. You could then derive a "zero point" directly from the OSM database. Mike _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
